I went to check yest,and found out that my manifold is 4.2.1...aiks...mayb previous owner changed it...mayb this is the reason?and i cant find o2 sensor near manifold oso...izit it had been removed?
Ori is 4-2-1. O2 senser located under the 1 section behind the engine.
Huh?r u sure bcoz the mech very comfirm that ori is not 4.2.1...haha...